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Increasing the focal length on the camera is killing my fps

When I increase the focal length the framerate comes to a crawl and I don’t think it’s the dof effect because it does it with high f-stops and little dof present.

I am using adaptive tessellation so maybe it is something to do with the engine tessellating everrthing without regard to the new frustrum achieved with a narrower field of view?

Is there a way to get my frames back without a wide angle all of the time?

I just checked stat>landscape and my processed triangle count goes from 1,100,000 to 2,200,000 when I go from 10 mm to 50 mm respectively… Shouldn’t the triangle count be about the same with adaptive tessellation on regardless of focal length? Isn’t that kind of the point?

Your view should not have more than roughly 250.000 triangles. It depends ofc what kind of application and hardware requirement specs you target.

I am just trying to keep it above 30 for working in the editor but in the end this is for cinematic/visualization, not a game.